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| author | Florian Weimer <fweimer@redhat.com> | 2022-08-30 10:02:49 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2022-08-30 10:02:49 +0200 |
| commit | 32b599ac8c21c4c332cc3900a792a1395bca79c7 (patch) | |
| tree | bb8d641a5edb1fdbeee48324d43b91c7877b2fa8 /resolv/nss_dns | |
| parent | d101d836e7e4bd1d4e4972b0e0bd0a55c9b650fa (diff) | |
| download | glibc-32b599ac8c21c4c332cc3900a792a1395bca79c7.tar.gz glibc-32b599ac8c21c4c332cc3900a792a1395bca79c7.tar.xz glibc-32b599ac8c21c4c332cc3900a792a1395bca79c7.zip | |
nss_dns: In gaih_getanswer_slice, skip strange aliases (bug 12154)
If the name is not a host name, skip adding it to the result, instead of reporting query failure. This fixes bug 12154 for getaddrinfo. This commit still keeps the old parsing code, and only adjusts when a host name is copied. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Diffstat (limited to 'resolv/nss_dns')
| -rw-r--r-- | resolv/nss_dns/dns-host.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c index b887e77e9c..bea505d697 100644 --- a/resolv/nss_dns/dns-host.c +++ b/resolv/nss_dns/dns-host.c @@ -970,12 +970,12 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname, n = -1; } - if (__glibc_unlikely (n < 0 || __libc_res_hnok (buffer) == 0)) + if (__glibc_unlikely (n < 0)) { ++had_error; continue; } - if (*firstp && canon == NULL) + if (*firstp && canon == NULL && __libc_res_hnok (buffer)) { h_name = buffer; buffer += h_namelen; @@ -1021,14 +1021,14 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname, n = __libc_dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf); - if (__glibc_unlikely (n < 0 || __libc_res_hnok (tbuf) == 0)) + if (__glibc_unlikely (n < 0)) { ++had_error; continue; } cp += n; - if (*firstp) + if (*firstp && __libc_res_hnok (tbuf)) { /* Reclaim buffer space. */ if (h_name + h_namelen == buffer) |